Basically they are the same metabolically, or they can be. The goal in sprints is to get the heart rate up to max from the sprint and then give a short rest period. Well, you can do the same with weights if you are using compound movements. Granted, shoulder pressing isn't going to be as effective as a sprint because your using less muscle mass. If you get on a leg press machine, however, and use a weight that allows for 20-30 reps you'll find that way more taxing than sprints.
Would I be putting a grain-feed cow on a fad diet if I took it out of the feedlot and put it on pasture eating the grass nature intended?